Stitching machine



May 11 ,1926. 1,583,935

E. LESCHHORN STITCHING, MACHINE Filed Jan. 14, 1924 3 Sheets- Sheet 2May 11 1926. 7 1,583,935 E LESCHHORN srncame momma Filed Jan. 14. 1924 sSheets-Sheet 5 Patented May 11, 1926.

UNITED STATES 1,583,935 PATENT OFFICE.

ERNEST LESCHHORN, OF CHICAGO, ILLINOIS, ASSIGNOR TO LA'IHAM MACHINERYCOMPANY, OF CHICAGO, ILLINOIS, CORPORATION OF ILLINOIS.

STITCI-IING MACHINE.

- Application filed January 14, 1924. Serial No. 685,944.

This invention relates to an improved stitching machine.

The principal object of the present invention is to provide asimplifiedstitching machine in which the number of parts used toconstruct the machine arereduced to a minimum. 7

A further object of the invention is to provide a very efficient andinexpensive 1O stitching machine in'which all the parts are compactlyarranged.

A still further object of the invention is to reduce the number ofoperative parts of a stitching machine to a minimum and thereby prolongthe life of the machine.

A still further object of the invention is to provide a stitchingmachine in which one of the feed rollers is secured to the main driveshaft and positioned directly above the staple forming and drivingmechanism.

A still further object of the invention is to provide an improved formof wire feeding mechanism.

A still further object of the invention is to providsa compact stitcherhead which can be quickly detached or removed from the arm of the mainframe.

These and other objects are accomplished by providing a construction andan arrangement of the various parts in the manner hereinafter describedand particularly pointed out in the appended claims.

Referring to the drawings, Fig. 1 is a front elevational view of myimproved and simplified stitching machine.

Fig. 2 is a cross sectional view of the same taken on the lines 22 inFig. l.

Fig. 3 is a cross sectional view taken on the lines 33 in Fig. 1.

Fig. 4 is a cross sectional the lines 4-4 in Fig. 3.

Fig. 5 is a-detailed view showing a front elevation of the cuttingmechanism.

Fig. 6 is a top plan andside elevational view respectively of myimproved wire feeding mechanism.

Fig. 7 is a cross sectional view taken on the lines 77 in Fig. 5 andFig. 8 is a detailed view showing the manner in which the upper feedroller is cocentrically mounted on the shaft.

For the purpose of illustration I have shown'iny improved and simplifiedstitching machine detachably secured to an arm 10 of "the main frame ofthe stitching machine.

View taken on The stitcher head is removably secured to the arm 10 bymeans of bolts 11. These bolts 11 secure radially extending flanges 13of the arm 10 to a plate 14. The plate 14 has secured thereto by meansof screws 15 a spool supporting bracket 16, which is offset with respectto the longitudinal center of themachine and supports on the upper endthereof a spool of wire 17. The spool is held from accidental rotationbya pressed spring brake 18 which has its outer end curved substantiallyin the form of a semi-circle 19 for guiding the wire through the usualwire straightening device 20 and wire spring pressed check mechanism 21.Rotatably mounted within the arm 10 in suitable bearings, not shown, isa main drive shaft '22, the outer end of which is provided with adriving pin'23 which is adapted to be seated in a recess 24 formed inthe sleeve 25 of the spur gear 26, for detachably securing the operativeparts of the stitcher head to the main drive shaft 22 of the stitchingmachine. The outer end of the main shaft 22extends into the sleeve 25 ofthe spur gear 26 and butts against one end of a stud 27, as shown at 28.The stud 27 is journalled in ahearing portion 29 of the'plate 14. Thegear 26 is secured to the stud-27 by a pin 30. This arrangement permitsthe stud 27 to be substantially a continuation of the main drive shaft22 and at the same time permits the stitching head to be detached fromthe arm 10 when it is desired to remove the head. Secured to the reducedportion 31 of the stud 27 is a cam 32. Positioned forwardly of the cam32 is asecond cam 33, which has a wire feeding surface 34 on the outerperiphery thereof. These cams 32 and 33 are secured to the stud v in anywell known manner. Positioned directly above the cam 33 and operativelydriven by a gear 3.5, which is secured to a stud 36 is a second feed camor roller 37 which is provided with a peripherally projecting camsurface 38 which in turn co-operates with the feeding surface 34 of thecam 33 for impinging the wire therebetween and feeding the wire to thestaple forming and driving mechanism. The stud 36 is mounted in abearing portion 39 of the plate 14. 'The stud 36 has formed in tegrallytherewith a collar portion 40 which bears against the front face of theplate 14. Adjustably mounted on a reduced portion 41 of the stud 36 is afeed rollersupport 42.

Pivotally mounted by means of a pin 43 is the feed roller or cam 37. Thefeed roller 37 is provided with a centrally disposed bore 44. The bore44 of the feed roller 37 loosely receives the forwardly projectingannular flange 45 formed integrally with the feed roll supporting member42. The feeding surface 38 of the feed roller 37 is normally pressedoutwardly by a compression spring 46 which has one end thereof seated ina socket 47 of the feed roller support 42 and the other end thereofengaging a pin 48 secured to the feed roller 37 on the rear sidethereof, as clearly shown in Figs. 1 and 2. It will be noted that theannular flange 45 of the feed roller supporting member 42 projectsslightly beyond the front surface of the feed roller 37 in such a mannerthat a washer 49 and a bolt .50 clamp the feed roller supporting member42 between the washer and the annular flange 40 of the stud 36 andthereby permit the roller supporting member 42 to be rotatably adjustedwith respect to the stud 36. It will further be noted that because thebore 44 of the roller 37 is larger in diameter than the flange 45 of thefeed roll supporting member 42, the feed roller 37 may swing about itspivot 43 on the member 42 for resiliently impinging the wire between thecam'surface 38 of the roller 37 and the cam surface 34 of the feed cam33 for feeding the wire to the staple forming and driving mechanism.\Vhen it is desired to vary the length of wire to be fed to the stapleforming and driving mechanism the bolt 50 may be loosened so that thefeed roller 37 together with its supporting member 42 may be rotatablyadjusted with re spect to the stud 36 and thereby vary the position ofthe cam surface 38 with respect to the cam surface 34 for varying thelength of wire fed.

From the above it will be noted that by positioning one of the feedrollers on substantially the main drive shaft I have eliminated a numberof intermediate operative parts and have compactly arranged the feedingmechanism in close association with the main drive shaft. Formed in thefront side of the plate 14 is the usual staple former channel 51 havingreciprocally mounted therein a staple former 52, which, in turn, 15provided with a vertically extending cl1annel 53. The channel 53 of thestaple former 52 has reciprocally mounted therein a staple driver 54.The staple former 52 is opera tively driven to form the staples by thecam 32, which engages a roller 55 journalled on a pin secured to therear side and upper end of the staple former. Thestaple former isnormally returned to its uppermost position by a compression spring 56,which is seated in a socket 57 formed in the forward side of the plate14 adjacent the staple former. The upper end of the compression the terblock 73. g

with its reciprocally mounted plate 78 is spring 56 is positioned in atubular member 58 which normally engages a pin 59 secured to the rearside of the staple former just below the roller 55, the tubular memberbeing reciprocally mounted in the bore 57 of the block 14. The stapledriver 54 is operatively driven by the usual pitman connection 60, whichhas one end thereof connected, as shown at 61, eccentrically withrespect to the axis of the cam 33 and the other end thereof connected,as shown at 62, to the upper end of the driver. (lo-operating with thestaple forming and drivingmechanism is the usual anvil 63 and staplesupporter 64. The anvil 63 is provided with a wire groove 65 and acompression spring 66, which normally forces the anvil out into the pathof the staple forming and driving mechanism. The staple supporter isnormally actuated into the path of the staple forming and drivingmechanism by means of a compression spring 66", which acts on a plunger67. The anvil 63 and staple supporting mechanism 64 in co-operation withthe staple forming and driving mechanism, operates in the manner wellknown in the art, and a more detailed description of the operation andconstruction of this mechanism is thought unnecessary.

Adjustably mounted adjacent the staple forming and driving mechanism ismy improved wire cutting mechanism which comprises a horizontallyadjustable block 68 which has a rearwardly extending portion 69, whichis adapted to slidably engage the channel 70 formed on the forward faceof I plate 14 for horizontally adjusting the block 68 with respect tothe staple forming and driving mechanism. Mounted in the block 68 in anywell known manner is the usual cutter tube 71. Secured to the block 68at theiopposite ends thereof and extending upwardly therefrom are twoguide pins 72. Reciprocally mounted on the guide pins 72 is a cutterblock 73 and secured to the cutter block 73 on the side adjacent thestaple forming and driving mechanism by means of a screw 74 is the usualknife 75. Formed on the inner side and adjacent the top of the cutterblock 73 is a projecting flange 76 having thereunder an undercut channel77. Intermeshing with the flange 76 and the recess or channel 77 in amanner to engage and operatively actuate the cutter block 73 is areciprocally mounted plate 78 which is positioned between the frontplate 79 and the main plate 14 of the stitcher head.

The front plate 79 is provided with an offset portion as shown at 80,which forms a stop for the upward movement of the cut- The cutter block73 together normally actuated to its uppermost position by a compressionspring 81, which is seated in a recess 82 formed on the front side ofthe plate 14, as shown in Figs. 3 and 4. The

upper end of the compression spring 81 is adapted to engage a pin 83secured to the rear side of the reciprocally mounted plate 78.Thecutting mechanism is actuated to cut the wire by a lever 84 pivotedat 85 to the plate 14. The lever 84 has an upwardly curved portion, asshown at 86, which is adapted to be engaged by a cam portion 87 formedas an integral part of the cam member 33. The lever 84 is furtherprovided with the laterally projecting portion 88 which is adapted tohave in threaded engagement therewith an adjusting screw 89 and a locknut he lower end of the adjusting screw 89 is adapted to engage theupper portion 91 of the reciprocally mounted plate 78. By thisconstruction it will readily be seen that during each cycle of operationthe cam surface 87 of the cam 33 will engage the free end 86 of thelever 84 and swing said lever in a counter-clockwise direction, therebyforcing the reciprocating plate downwardly with its cutter block 73 andactuating the knife to cut the wire extending through the cutter tube71. In connection with adjusting my cutter box horizontally with respectto the staple forming and driving mechanism I have provided a series oftapered or conical cavities 92, which are adapted to be engaged by atapered or conical point 93 of thumb screw 94. The thumb screw 94 is inthreaded engagement with the front plate 79, as shown at 95.

From the above it will readily be understood that when itis desired toadjust the cutter block 73 together with the cutter tube and block 68the thumb screw 94 is unscrewed from engagement with one of thecavities: 92 of the block 68 and the cutter blocks 73 and 68 arehorizontally adjusted by sliding this cutting mechanism horizontally inthe channels or intermeshing parts 76 and 77 between the lower end ofthe re ciprocating plate 78 and theupper part of the cutter box 73. Inmaking this adjustment it will also be noted that the rearwardlyprojecting portion 69 of the block 68 is horizontally adjusted in thechannel of the plate 14.

In the operation of the above described device it will be understoodthat the wire is fed from the spool 17 around the semi-circular guidemember 19 throughthe wire straightening and wire checking devices 20 and21, respectively, where it is engaged by the feeding surfaces 38 and 34of the feed rollers 37 and 33, respectively, through a circular guidetube 96 into the cutter tube 71, where it passes into the groove formedon the front side of the anvil. After the wire is thus fed, the cam 87of the feed roller 33 engages the free end 86 of the lever 84 andactuates the lever about its pivot 85, depressing the cutting mechanism73 through the reciprocating plate 78 against the tension of thecompression spring 81 causing the wire to be severed. Simultaneouslywith the severing of the wire, the cam 32 engages the roller 55 anddepresses the staple former 52 against the compression spring 56. At thecompletion of the staple forming operation the staple driver 54 is thenactuated through the medium of the pitmanconnection 60 in driving thestaple into the work beneath the head. I It will be understood, ofcourse, that the anvil 63 is forced from the path of the staple formingand driving mechanism by the staple driver which engages the bevelledfront face of the anvil in its downward movement and that the staplesupporting member 64 is likewise withdrawn by the downward action of thestaple driver as it is completing its work in driving the staple. j

From the above description it will be readily seen that I have provideda very simple and eflicient wire stitching machine and one in which theparts are reduced to a minimum and at the same time I have retained awide range of adjustments. By mounting one of the feed rollers or feedcams of the feeding mechanism on the main or drive shaft I have provideda construction in which all the parts are compactly arranged so that avery inexpensive and yet efficient stapling machine has been provided.

While in the above specification I have described one embodiment whichmyinven tion may assume in practice, it will, of course, be understoodthat the same is capable of modification and that modification may beemployed without departing from the spirit and scope of my invention asexpressed in the following claims.

What I claim as my invention and desire to secure by Letters Patent is:r

1. A wire stitching machine comprising a frame, a drive shaft mounted insaid frame, a detachable stitcher head mounted on said frame, a studmounted in said head forming a continuation of said shaft, and

means whereby said stud may be detachably connected to said drive shaft.

2. A wire stitching machine comprising a ,to said frame, a stud mountedon said stitcher head and having wire feeding mechanism operativelyconnected therewith, staple forming and driving mechanism 0 era- ,tivelyconnected with said stud, and a s eeve whereby said stud may bedetachably connected with said shaft and operatively driven thereby. V 1

6. A wire stitching machine comprising a frame, a driving shaft mountedin said frame, a stitcher head detachably secured to said frame, a studmounted on said stitcher head and having wire feeding mechanism;

operatively connected therewith, staple forming and driving mechanismoperatively connected with said stud, and a sleeve secured to said studand slidably connected with said shaft whereby said stud may be.

detachably connected with said'shaft and operatively driven thereby. V

7 A wire stitching machine comprising a frame, a driving shaft mountedin said frame, a stitcher head detachably secured to said frame, a studmounted on said stitcher head, a wire feed roller secured to.

said stud, a second feed roller mounted on said head co-operating withsaid first named roller, and a sleeve secured to said stud and adaptedto slidingly engage said drive shaft for operatively driving said feedrollers.

8. A wire stitching machine comprising a frame, a driving shaft mountedin said frame, a stitcher head detachably secured.

to said frame, a stud mounted in said head forming a continuation ofsaid drive shaft, a feed roller carried by said stud, a second feedroller mounted in said head and positioned directly above said firstnamed roller and co-operating therewith to feed a wire between portionsof their peripheries, and a sleeve secured to said stud and slidinglyengaging said drive shaft whereby said head may be detached from saidframe.

9. A wire stitching machine comprising a frame, a drive shaft mounted onsaid frame, a stitcher head detachably secured to said frame, a studmounted on said stitcher head and having wire feeding mechanismopertively connected therewith, staple forming and driving mechanismoperatively connected with said stud, a driving pin secured to saiddrive shaft, and a sleeve secured to said stud and having means forengaging said driving pin whereby said stud may be detachably connectedwith said shaft and operatively driven thereby.

10. A wire stitching machine comprising a frame, a drive shaft mountedon sald frame, a stitcher head detachably secured to said frame, a studmounted on said stitcher head and having wire feeding mechanismoperatively connected therewith, sta-,

pie forming and driving mechanism operatively connected with said stud,a driving pin secured to said drive shaft, and a sleeve secured to saidstud and having a recess formed therein for engaging said driving pinwhereby said stud may be detachably connected with'said shaft andoperatively driven thereby.

11. A wire stitching machine comprising a frame, a driving shaft mountedon said frame, a stitcher head detachably secured to said frame, a studmounted in said head forming a continuation of said driving shaft, afeed roller carried by said stud, a

second feed roller mounted in saidhead and positioned directly abovesaid first named roller and cooperating therewith to feed the wirebetween portions of their peripheries, a driving pin secured to saiddriving shaft, and a sleeve secured to said stud having a recess formedtherein for engaging said driving pin whereby said sleeve mayslidablyengage said shaft for detachably connecting said head to saidframe.

In testimony whereof I have signed my name to this specification on this9th day of January A. D. 1924.

ERNEST LESGHHORN.

